影响埋地塑料水管泄漏噪声测量频率范围的关键因素:理论与实验

IF 1.3 Q3 ACOUSTICS
O. Scussel, M. Brennan, Fabrício Cézar L. de Almeida, M. Iwanaga, J. Muggleton, P. Joseph, Yan Gao
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引用次数: 0

摘要

使用声学相关器测量的埋地水管泄漏噪声的频率范围在很大程度上取决于管道的类型及其位置以及所用传感器的类型。在进行测试之前,对这个频率范围有一个大致的想法对操作员来说是有益的;然而,目前除了通过实践经验之外,还没有预测它的方法,而且还不存在基于模型的方法。本文通过使用一个简洁相对简单的水管-土壤系统分析模型,结合传感器的频率响应,解决了这个问题。研究了系统的各种物理参数,如管道和土壤特性以及传感器类型,对泄漏噪声信号的交叉功率谱密度(CPSD)以及频率范围的影响。影响带宽的主要因素是传感器之间的距离、管道中主要由流体传播的波的波速以及该波的衰减。研究表明,外部介质对传播有着深远的影响,进而对带宽也有影响。使用来自三个不同测试点的实验数据验证了预测该带宽的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Key Factors That Influence the Frequency Range of Measured Leak Noise in Buried Plastic Water Pipes: Theory and Experiment
The frequency range of the leak noise in buried water pipes, measured using acoustic correlators, depends significantly on the type of pipe and its location as well as the type of sensors used. Having a rough idea of this frequency range can be beneficial for operators prior to conducting tests; however, there is currently no method of predicting it except through practical experience, and no model-based approach yet exists. This issue is addressed in the present paper by using a concise and relatively simple analytical model of the water-pipe–soil system combined with the sensors’ frequency response. The influence of the various physical parameters of the system, such as the pipe and soil properties and the sensor type, on the cross-power spectral density (CPSD) of leak noise signals and, furthermore, the frequency range are investigated. The main factors that affect the bandwidth are the distance between the sensors, wave speed of the predominantly fluid-borne wave in the pipe and the attenuation of this wave. It is shown that the external medium has a profound effect on the propagation and, in turn, on the bandwidth. The approach to predicting this bandwidth is validated using experimental data from three different test sites.
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来源期刊
CiteScore
3.70
自引率
0.00%
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审稿时长
11 weeks
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